[klippy]

I just observed Firefox's Network Monitor to see what exactly happens when sending a request (loading a page).
It returns 301 because it tries to redirect you to the secure version (HTTPS) of the forum, instead of HTTP. Looks like you have to send a HTTPS request to retrieve the page. I don't know how it's done, but I believe there's a lot more to it than just a simple request, like with HTTP.